Hold'em table

Q8o is a marginal but playable button open in three-handed play; a 2.5bb raise takes the initiative and denies a cheap flop better than limping.

A3o from the small blind is too weak to defend against a 2.5x button open with the big blind still to act; I'm dominated by better aces and the hand plays poorly postflop out of position.

Holding 6s 2d offsuit in the big blind against an open raise is a clear and easy fold.

Ten-three offsuit is one of the worst starting hands, and I'm facing a call from the button with two players yet to act behind. Folding is clearly the best play.

Holding AQo in the small blind after the button folds, raising to 3 bb is standard for value and positional initiative.

75o is too weak to continue out of position against a 3bb open; the pot odds do not compensate for poor equity and playability.

A3s is a standard open-raising hand from the button in 3-handed play. Opening to 2.5bb to build the pot in position.

Q9 offsuit is too weak to call a button raise out of position with the big blind still to act, so folding avoids a dominated spot.

Calling 150 into a 400 pot gives ~2.7:1, and a button raise in 3-handed is usually wide enough that 97o has sufficient equity to defend the big blind cheaply rather than fold.

I flopped middle pair (nines) on an ace-high board against the preflop raiser, and I'm out of position heads-up. Checking keeps the pot small and lets me evaluate their action rather than bloat the pot with a marginal hand that's often behind Ax.

Check back top pair with a weak kicker on a dry board to control pot size and keep opponent's bluffs in.

I checked back top pair with a weak kicker on the flop. After opponent checks turn again, I bet for thin value and protection against straight draws and second pairs.

I have 9-high with a gutshot-ish nothing on an A-Q-5-9 board; seat_3 bet the turn after checking the flop, which usually means an ace or better. Folding is cheapest.

K2o is too weak to open first in from the button; it is dominated by continuing ranges and plays poorly if called.

Pocket eights are strong heads-up against the big blind; raising builds the pot with initiative and applies pressure rather than limping and letting the BB see a cheap flop.

A2o plays poorly postflop against a 3x open even with position, so folding is standard.

T9s is a strong speculative hand and I have position on the button in a 3-handed game, so a standard open to 3x builds the pot with initiative and fold equity.

5h2h is too weak to defend from the small blind against a 3bb open out of position.

K9o is playable enough from the big blind against a button open, and calling 200 into 450 meets the price. A three-bet would be too thin with this offsuit king.

K9o is king-high on a paired flop with no draw, so I check and keep the pot small rather than bluff into the preflop raiser.

I opened preflop and picked up an open-ended straight draw on 767; betting ~half pot builds the pot and applies pressure to the checking big blind.

King-high with no pair and no real draw is too weak to continue against a flop bet on a paired board, and a raise would be a pure bluff with poor blockers.

Opening 2.5bb from the button with suited connectors (JTs) to build the pot in position.

Q2 offsuit is too weak to continue out of position against a button open, so folding is the highest-EV line.

K2o out of position against a 2.5x button raise is too weak to continue profitably; folding avoids a dominated situation.